I have a Tom Tom G0 700 Sat Nav in the car , the other day the wife grabbed the in car charger for her bluetooth headset instead of the Sat nav and proceeded to charge up the Sat nav with the headset charger 
It flashed on and straight off and now nothing appears onscreen , there is a front light that illuminates but with a black screen and no sound .
Is this now fried or is there some internal protection or fuse .
I have tried the reset button on the base but it does diddly squat .
I did google and found a post that a GD700 had a black screen ,( no mention of it been used with the wrong charger) and it said something along the lines of
Remove the back , remove the 2 boards and disconnect the battery ( internal I assume )
I cannot see how or where there are any screws to take the back or front off to try this as a fix
Anyone offer any advise prior to listing it as faulty , spares or repairs on eBay
Thanks

It flashed on and straight off and now nothing appears onscreen , there is a front light that illuminates but with a black screen and no sound .
Is this now fried or is there some internal protection or fuse .
I have tried the reset button on the base but it does diddly squat .
I did google and found a post that a GD700 had a black screen ,( no mention of it been used with the wrong charger) and it said something along the lines of
Remove the back , remove the 2 boards and disconnect the battery ( internal I assume )
I cannot see how or where there are any screws to take the back or front off to try this as a fix
Anyone offer any advise prior to listing it as faulty , spares or repairs on eBay
Thanks
